Saw clamp



Jan.. 13, 1948.

W. P. JOHNSON' SAW CLAMP 1946 2 Sheets-Sheei'I l Filed Oct. 18

mm mm {NVENTOR JOHNSON ATTORNEY JanQla, 194s. w. P. JOHNSON SAW CLAMP Filed Oct. v18, 1946 2 Sheets-Sheet 2 @Aww/MQW INVENTOR WILUAM R JOHNSON ATTORN EY WOWOWO? Patented Jan. 13,` 1948 VUNITED .S TATES T "F FICE SAW CLAMP -William P. Johnson, Oswego, Oreg.

(Application 0ctoher.18, 1946, Serial No. 703,999

(Cl. 76-780Y 4V Claims. 41

.This invention relates 4izo-sawl clamps and Lis particularly, adapted `for holding hand saws and the like.

The `primaryobject-of the-inventionis to provide .aclamp -ior lholding the saws made from l .These and other incidentalobiects will be;`ap parentfinthe drawings, specication andciaims.

.Referring to the drawings:

Figuregl vis a perspective view .of myinew and improvedsaw clamp mounted .to a supporting table land indicating the position ofthe saw lwithinthe clamp by broken lines-for convenience ofillustration.

.Figure 2` is a plan view, partsbrokenfawayior convenience of illustration of'Figure l.

Figure 3 is an end view of the clamp mounted upon the table with the jaws swung part way open, parts broken away for convenience of illustration.

Figure 4 is a detailed fragmentary sectional view taken on line 4-4 of Figure 3.

Figure 5 is a perspective detail of one end of the framework of the clamp, partially in section,

In the drawings:

My new and improved saw clamp consists of a frame comprising vertical ends I and 2 tied together by the horizontal plate 3. The plate 3 being preferably welded to the end structures I and 2 at 4, as for instance spot Welding. The end frames I and 2 are bifurcated at 5, the upright arms 6 providing for the mounting 0f the jaw 1.

The jaw 1 consists of a horizontal' vertical cross bar s and an inclined cross bar 9 secured to the cross bar 8 at I0 by welding or other suitable means. This provides a lip I I extending up above the :surface of the cross bar 9 providing for close observation of the saw. The inclined bar 9 has markings I2 engraved thereon providing a guide for the operation of the nle through the teeth of the saw. Both the cross bars 8 and 9 are secured to the upright arms 6 by welding or other suitable means at I3 and I4.

Right angle bends I5 are formed on the arms 6 and welded to the cross plate 3 at I 6, providing-strength" and `rigidity-to .the arm. The upright arms Il also haver-right angle bends -I8 `welded-to thecross bar 3 atI9, providing for said rigidity. The upright arms l-'lfarerigidoi struc- .ture andi-provide Aa support Efor the `pi-votally .mounted .arms-20. The :arms 2are pivotally mounted-at 2| to the uprights-rll. Mounted on ltheir upperends 1isfza vsaw holdingclamp bar `22 iwhichfconsists of a rightangle bar. Thisbarfis welded at -23 to the upper1ends .of Tthe arms :20, .this provides :for the .clamping :iawontha clamp assembly.

Eccentreiarms 2lby are -rpivotallymounted-- at` 2 5 ato the :omss-irodxanchored ftothezlower ends ofi the@.endiframesiv I -and 2 best illustrated in Figuresxlrand 3. Theserarms have eccentrics 21 formed-:zon `their .pivctally mountedends lwhich contactntheislower ends .Z8-of the pivotally mounted'ia-rms.- 2Q. Right-angle bends 29 are :formed'eon vthe farms 20 and provide lfor y'rigidity o =the armszandra fplaeeffor fthe eccentrics '21 to contact. The 'arms 20. are furthernheldfin .alignment: by Athe' :turned fout portions 30,I iWhich are biiurcatedfat ;3 Ifovellapping theen-d members at 32 bridging between the upright 6 and the upright I1. This prevents the lower ends 2B of the arms 20 from being sprung outwardly in the operation of the clamp.

Right angle bends 33 are formed on the lower ends of the frames I and 2 and form one of the jaws of the clamp for holding the saw to the supporting element, as for instance the member 34 forming part of the table 35. The above said clamp consists of a right angle jaw member 36 pivotally mounted at 31 to the cross bar 3. A floating clamp member 38 is forced against the supporting member 34, best illustrated in Figures 1, 2 and 3. This assembly is of Well known construction with the exception that I pivotally mount the same as stated above at 31 so that the clamp can be swung to the broken line position as indicated in Figure 2 while the saw clamp is not in use. This is one of the features of my invention.

I will now describe the operation of my new and improved saw clamp. The clamping jaw members 35 are unfolded from the dotted position as shown in Figure 2 and applied to any suitable support. as for instance the support 34 and the cranks 39 are operated in the usual manner setting the movable jaw 38 against the supporting member 34 and the stationary jaw member 33. The bottom ends 40 of the end frames I and 2 rest on the table 35. This provides for a rigid support for the entire clamp assembly. The

eccentric arms 24 would normally be folded to the broken line position providing freedom of operation of the clamp 23 so that the saw can be inserted therein best illustrated in Figure 3.

When the saw has been put in place the arms 24 are lowered to the position shown in Figure 1 causing the eccentrics 21 to bear against the lower ends 28 of the pivotally mounted arms 20 bringing the jaws 8 and 23 of the saw clamp tightly against the saw. The operator applies his le to the teeth following whatever selected indicator line he desires as indicated by the lines l2 on the sloping bar 1 I do not wish to be limited to the exact mechanical detail as shown, as other mechanical equivalents may be substituted still coming within the scope of my claims.

I claim:

1. A saw clamp comprising a frame, the ends of which are bifurcated, a xed clamping bar connected to the upper ends of the bifurcated ends of the frame, movable armsrpivoted to the ends of the bifurcated frame,'said arms having one side edge bent outwardly to form strengthening ribs, lugs extending from the arms to and between thebifurcated ends of the frame to prevent lateral bending of said arms, a clamping bar secured to the upper ends of the arms, and a pair of levers pivotally mounted on the ends of the frame, said levers having cams formed on their inner ends to engage the ribs on the arms to actuate the clamping bar carried by the pivoted arms.

2. A saw clamp, comprising a frame including a horizontal plate, end members secured to the ends of'the horizontal plate and extending upwardly therefrom, that portion of the end members above the horizontal plate being divided to provide spaced arms, one member of a saw clamp mounted at the upper end of one arm of the end members, the other arm of each of said members terminating short of the first-mentioned arm, a saw clamp carrying section pivotally mounted on said upright of shorter length, a saw clamp mem ber for cooperation with the first-mentioned saw 4 clamp to x the saw for operation, the pivoted section carrying the moving saw clamp member moving the respective saw clamps relative to each other for clamping and releasing the saw, levers pivotally connected to the end frames and movable to engage and fix the pivotally connected saw clamp carrying section to compel clamping cooperation of the saw clamps, the saw clamp moving section at each end of the frame having guiding means cooperating with one of the end arms to prevent lateral displacement of the movable saw clamp carrying element in operation by the levers.

3. A construction as dened in claim 2, wherein the end frames are provided adjacent the inner edges of the bifurcation with inwardly extending bracing sections, the lower ends of which are rigidly secured to the horizontal plate.

4. A construction as deiined in claim 2, wherein the levers for operating the movable saw clamp member are pivotally mounted upon a shaft extending beneath the horizontal plate and through the end frames below that plate, the operative end of each lever having an eccentric edge to create increasing pressure on the movable saw clamp carrying section as the lever is moved in one direction.

WILLIAM P. JOHNSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 373,148 Marsh Nov. 15, 1887 510,846 Disston Dec. 12, 1893 778,605 Potterl Dec. 27, 1904 918,338 Ljung Apr. 13, 1909 1,196,772 Gaede Sept. 5, 1916 1,263,652 Davis Apr. 23, 1918 1,324,594 Huggins Dec. 9, 1919 1,475,351 Phillips NOV. 27, 1923 1,507,501 Miller Sept. 2, 1924 1,676,188 Hugus July 3, 1928 

